Cigarette rod cutting device for cigarette machines



July 1.9, 1932 M. P. E. HOHN CIGARETTE ROD CUTTING DEVICE FOR CIGARETTEMACHINES Filed June 20, 1929 3 Sheets-Sheet 1 Fig. 4

103 I08 og llO' y 1932- M. P. E. HOHN 1,868,012

CIGARETTE ROD CUTTING DEVICE FOR CIGARETTE MACHINES Filed June 20, 19295 Sheets-Sheet 2 July 19, 1932- M. P. E. HOHN 1,863,012

CIGARETTE ROD CUTTING DEVICE FOR CIGARETTE MACHINES Filed June 20, 19295 Sheets-Sheet 3 Fig. 3

Patented July 19, 1932 UNITED STATES PATENT OFFICE MAX PAUL ERNSTHOT-IN, F DRESDEN, GERMANY, ASSIGNOR TO THE FIRM UNI- VERSELLECIGARETTENMASCHINEN FABRIK J. C. MULLER & (70., OF DRESDEN,'GER- MANYCIGARETTE ROD CUTTING DEVICE FOR CIGARETTE MACHINES Application filedJune 20, 1929, Serial No. 372,387, and in Germany February 20, 1929.

shaft of which is mounted on a support the axis of rotation of which isapproximately parallel to the longitudinal direction of the cigaretterod. The cutter shaft is thus separately set in rotation by the rotationof the Qpreferably disc-shaped support.

The invention is characterized by the following arrangements (a) Thearrangement of the cutter shaft bearing on a disc or like support theplane of which is at right angles to the longitudinal axis of the shaftcarrying it, the cutter shaft being shiftable in relation to the discand the supporting shaft being shiftable in relation to the rod.

(6) The arrangement that the supporting shaft is mounted in a hollowbearing head which is arranged in the form of a turntable on a bearingbracket in which is mounted the upright driving shaft for the supportingshaft about the longitudinal axis of which the turntable movement takesplace, the motion being transmitted between the two shafts by bevelgearing.

(c) The arrangement that the bearing bracket is rendered movable andadjustable with the upright driving shaft and the hearing of thesupporting shaft carried thereby about a horizontal axis on which shaftis arranged a worm wheel which meshes with a worm or the like on theupright shaft.

((Z) The arrangement that the bearing bracket of the cutter shaft mayturn on a support provided on the cutter shaft support in order tofacilitate rotation of the longitudinal axis of the cutter shaft in aplane transversely of the plane of the discshaped cutter support.

(6) The arrangement that the plate for the cutter shaft bearing issecured to a slide movable and adjustable radially with respect to thesupporting shaft while a balancing counter-weight is movably andadjustably sccuredon a second diametrically disposed slide, an adjustingdevice being provided which on unscrewing the fastening screws moves thetwo slides together in the direct1on to maintain the balance.

(f) The arrangement that the adjusting device consists of ascrew-threaded spindle which engages a counter-weight guided parallel tothe axis of the spindle, this spindle being hollow and provided with aninternal screw thread of opposite hand inwhich engages a screw threadedbolt mounted on a strap which is connected with the slide on which theplate of the cutter shaft support is mounted.

(g) The arrangement that-a friction wheel is mounted on the cuttershaftwhich contacts with a conical friction disc disposed concentrically ofthe axis of the cuttershaft support, the conical friction discbe'inglongi'tudinally movable on the spindle supporting'iti. e.longitudinally movable with respect to the cutter shaft, and thus beingcapable of adjustment as regards its distance from the disc like cuttershaft support.

h) The arrangement that thecon-ica'l friction disc is mounted directlyon the spindle of the cutter shaft supporting disc spindle while the hubof the supporting disc ismounted on a bush mounted on this spindleinball bearings provided at both ends, the drive being transmitted fromthe upright shaft facing bevel vpinions one of which is'secured directlyto the spindle of the supporting disc while the other is connected 'tothe hub of the disc shaped support.

(i) The arrangement that the relative adjustment of the bearing membersand the adjustmentabout the horizontal axis of thecutter shaft bearingis effected by studssecured to one part which extend throughcorresponding slots on the other part disposed concentrically of theaxis of rotation, scalesbeing provided which permit of exact adjustment.

(is) The arrangement that the holder for the cutting tubes is secured toa'cross bar-carried by two parallel horizontally adjustable rods whichproject from a closed casing in which the gearing is mounted, theconnecting rod of a crank and connecting rod gearing being connected toa second cross :bar provided in the casing which connects thetwoassociated rods.

Z) The arrangement that the chamber in which the gearing for the cuttingtube holder is closed by a cover in such manner that on removal of thecover the crank and connecting rod gearing is exposed for the purpose ofadjustment.

(m) The arrangement that the bearing housings are connected with oneanother and the lubricating oil is circulated by a gear pump within it,a ventilating branch being provided.

(a) The arrangement of a grinding disc in the path of the rotary cutterrotating about the supporting spindle the bearing member of which isadapted to turn on a plate in a shaft 1.

plane transversely of the plane of the supporting disc and adapted tovbe adjusted and secured in adjusted position, the plate being adapted tobe adjusted in the longitudinal 3 direction of the supporting axis.

The arrangement of a freely rotatable setting disc the spindle of whichis mounted in a hearing which is movable in a bearing bracket in aradial direction in relation to the cutter shaft supporting disc whichcan turn and be secured in adjusted position on a plate which isdisposed in a plane transversely of the cutter shaft supporting disc,the support of the platebeing movable and adjustable in ,T thelongitudinal direction of the disc carrying shaft;

The invention includes not only the combination of the arrangements (a)to (0) but also each arrangement separately so far as it I is new.

i The invention is illustrated in the accompanying drawings in whichFig. 1 is a vertical longitudinal section. Fig. 1a is a partialsectional view of a detail. Fig. 2 is a front view looked at in thedirection of the arrow in Fig. 1 the conical friction disc beingomitted. Fig. 3 is a plan view.

Referring to the drawings, the cigarette rod-'cuttingdevice is driven bythe driving Qn this shaft is mounted a pinion 2 which transmits motionthrough the medium of the pinion 3 on the spindle 4 to the horizontalshaft 5 through the pinion 6. This shaft extends through a housing 7 andis mounted at its ends in the base 8 of the rod cutting device. 011 theend of this shaft proj ecting beyond the base 8 is fitted a hand wheel 9in order to permit adjustment also by hand in which case naturally thedriving shaft 1 must be freed from the machine drive in the parts wherethe shaft extends through the wall of the casing being formed withsuitable openings for the purpose. In this turning movement the wormnaturally reparallel to the longitudinal axis of the shaft 5. Thehousing can be locked in any position by means of nuts on set screws. Onthe base 8 is provided a fixed scale 22 which is used in conjunctionwith a scale 24 provided on the bracket 23 on the housing 7. The desiredadjustment can be therefore always obtained.

The upright shaft 12 extends through an upper opening 25 in the housing7 and terminates in a bevel pinion 26. This bevel pinion meshes with twofacing bevel pinions 27, 28 the bevel pinion 27 being mounted direct onthe spindle 29 which is mounted in a housing 30 in ball bearings at 31,32, 33. This spindle projects beyond the housing at the right hand sideof Fig. 1 and is fitted with a conical friction disc 34 which is mountedon a bush 35 provided at one end with a number of longitudinal slits 36.The

one end of this sleeve is formed as a cone 37 while the other end isprovided with an external screw thread on which is screwed a nut 38. Byunscrewing the nut 38 the conical friction disc 34 can be moved slightlyto the right of Fig. 1 when the slits in the bush 35 expand permittingthe bush to be pushed along the spindle 29. The bush can be locked inits new position by again tightening the nut 38 when the friction disc34 is pressed against the cone 37 and the slitpart of the bushcompressed.

The bevel pinion 28 is freely rotatable on the spindle 29 and is securedby screws 39 to the hub 40 of a disc 41. This hub is freely rotatable inthe hollow housing 30 in ball bearings 42, 43 located at each end whilethe ball bearings 32, 33 allow rotation of the spindle 29 with respectto the hub 40.

As the bevel pinions, 27 28 face one another and are driven by the samebevel pinion 26 the spindle 29 is driven in one direction of rotationwhile the conical friction disc 34 is rotated in the opposite direction.In

other words the disc 41 rotates in the direchorizontal plane is effectedby turning the housing 30. For this purpose the upper part of thehousing 7 in which the housing is mounted is formed after the manner ofa turntable. The housing 30 rests with its circular collar at 44 in acorresponding circular opening in the housing 7 in such manner that itmay be rotated about the longitudinal axis of the upright shaft or aboutthe spindle 13 which is effected so that nothing is disturbed byrotation of the bevel gearing. In order to secure the housing 30 in thedesired position lugs 45, 46, 47 (see Fig. 3) are provided on thehousing 7 in which fit studs 48, 49, 50

= which extend through slots 51, 52, 53, in the corresponding lugsdisposed on the rotatable housing 30.

Locking can be effected by nuts screwed 011 the studs rotation beingpermissible Within the limits of the slots which are disposed con-.centrically of the spindle 13. A stationary scale 54 being provided onthe housing 7 and a scale 55 provided on the housing 30 any desiredadjustment can be obtained at any time by these two scales.

5: bearing 64 in which the cutter shaft 65 is rotatable. The plate 63can be turned about the plate 62 and secured by the nuts 66 and 67 onstuds secured to the plate 62 and extending through concentric slots inthe plate 63. The cutter shaft carries the rotary cutter 70 held inknown manner between clamping jaws 68 and 69. On the other end of thecutter shaft is mounted a friction roller 71 which contacts with theconical friction disc 34.

On radial displacement of the slide 56 and thus on bringing the cuttershaft nearer to or moving it further from the spindle 29, the conicalfriction disc 34 is correspondingly displaced longitudinally on thespindle 29 so as to ensure contact between the friction roller 71 andthe conical friction disc.

' As the conical friction disc 34 rotates in the opposite direction tothe disc 41 additional rotation is imparted to the cutter shaft i. e.

si there is obtained a greater number of revolutions than would beobtained if the friction roller 71 merely rolled around a stationaryconical friction disc 34.

The adjustment of the cutter shaft bearing on the plate 62 and theadjustment of the cigarette rod moves with reference to the succeedingpoints with the speed of the rod in the direction of feed andtheadjustment is such that the plane of the cutter at the moment thatthe cutting operation takes place 1s exactly at right angles to thelongitudinal of which the diameter of the rotary cutter alters. Therotary cutter becomes smaller in diameter in the course of use and agradual displacement of the cutter shaft bearing radially outwards isnecessary.

It is now essential that at the extraordinary high speeds of rotationabsolute dynamic balance of the masses is produced. This balance isobtained by the counter-weight 72 which is radially displaceable on thedisc 41, studs 73 and 74 secured to this disc extending through slots75, 76 disposed parallel to the direction of displacement of the weight72, the weight being locked in position by means of nuts on the studs.The counter-weight 72 engages by means of a bracket 77 ina radial slot78 in the disc 41. This bracket is provided with a screw threadedopening through which extends a screw threaded spindle 79. This spindleis held by a collar 80 in the disc 41, or in a part 81 structua-llyseparate therefrom but connected therewith. After unscrewing the studs73, 74 the weight 72 can be moved radially by rotation of the screwthreaded spindle 79.

The spindle is hollow and is open at the lower end and provided with aninternal screw thread of the opposite hand to the external screw threadof the spindle. Into the screw thread in the spindle extends a bolt 82which is secured to a strap v this strap are secured to the slide 56 at84 and 85. The strap embraces the spindle 29 or a lock nut 86 arrangedthereon, the slide 56 on its end adjacent the spindle 29 having acorresponding recess 87. As the result of this s arrangement, onrotation of the screw threaded spindle 79 movement the slide 5.6 and thecounter weight are moved radially, dynamic balancing of the masses beingthereby auto- :natica-lly effected.

The cigarette rod is supported :as usual-at the part where it is to becut by the tubes 88 and 89 which are mounted in the bracket 90. Thisbracket is secured by means of set screw 91 to a cross bar 92 which iscarried by the ends of two horizontal rods 93 and 94. The cross bar ismovable on the ends of the rods. It has split jaws embracing the rodswhich jaws can be drawn together by screws .97 and 98. housing 8 whichforms at its lower side a chamber 99 into which the main shaft 1.extends. On the shaft ismounted a crank disc 100 on the adjustablecrank pin 101 .of which is pivoted a connecting rod 102. This con- 83.The ends of The rods 93 and 94 project from the 1'15;

necting rod is pivoted at 103 to a bracket 104 to a second cross bar 105which like the cross bar 102, is secured to the rods 93 and 94.Accordingly the rods are moved by the cross bar 105 in their bearings106 and 107. The movement is such that the cutting tubes during thecutting operation when the rotary cutter penetrates the rods are movedin the direction of feed of the rod with the speed of the rod.

In the housing 8 is mounted a gear pump the pinions 108 and 109 of whichare driven by the main shaft 1 through the pinion 110. The chamber 99 isclosed by a cover 99 (see Fig. 2) after removal of which (see Fig. 1)the crank and connecting rod gearing for the rods 93 and 94 is exposedso that any necessary adjustment can easily be effected.

On each rotation of the spindle 29 or of the cutter shaft supportingdisc 41 the cutter comes into engagement with the grinding disc 111.(This grinding disc is omitted from F g. 1 in order not to confuse theillustration but is indicated in Figs. 2 and The grinding disc ismounted on a spindle 112 which is freely rotatable in the bearing 113.The hearing is carried by a bearing bracket 11 1 which terminates infoot plate 115 which is mounted on a base plate 116. lVith the baseplate 116 is connected a stud 117, which passes through a slot 118 andafoot 115 of the bracket 114:. After unscrewing the stud the foot 115can be adjusted on the base plate 116, within the limits of the slot118. The base plate 116 is formed as a. slide and is movable on theguide 119 in the direction of the cigarette rod i. e. towards the disc41. This movement is effected by means of a hand wheel 120, a spindle121 connected with the hand wheel passing through the screw threaded lug122 on the lower side of the slide 116. By the arrangement described thegrinding disc 111 as regards its inclination and position can be broughtinto the path of the rotary cutter 7 0 so that the cutting edge of thecutter or its facet is sharpened on the grinding disc.

In order to remove the burr formed on the opposite side of the rotarycutter disc the se tlting disc 123 is provided, the spindle 121' of thisdisc is freely rotatable in the bearing 135. The bearing itself ismovable and adjustable about the horizontal spindle 126. This spindle iscarried by a bearing bracket 127 the foot 128 of which is mounted on abase plate 129. A stud 130 passes through the opening in the foot 128.After unscrewing the stud the bearing member 127 can be turned about thestud in a horizontal plane. The base plate 129 is carried by bracket 131projecting from a slide 132. This slide is movable in the guide 133parallel to the direction of the cigarette rod i. e. transversely of thedisc by means of a handwheel 134 the screw threaded spindle 135 of whichpasses through a screw threaded opening in the slide 132. The settingdisc 1 3 can thus be exactly adjusted to the position of the cutter atany time.

It is necessary that the connected chambers 89, 7 and 30 can beventilated. For this purpose a ventilating pipe 136 is provided (seeFig. 1).

I claim:

1. A cigarette rod cutting device for cigarette machines including acutter shaft, a retary cutter mounted on said shaft and planeta-rygearing for driving the cutter shaft, a spindle, a slide movable andadjustable with respect to said spindle, a plate for the cutter shaftsecured to said sli .e, a second slide, a counter-weightmovably andadjustably secured on said second slide and adjusting means for movingthe two slides together.

2. A. cigarette rod cutting device for cigarette machines including acutter shaft, a rotary cutter mounted on said shaft and plan etarygearing for driving the cutter shaft, a spindle, a slide movable andadjustable with respect to said spindle, a plate for the cutter shaftsecured to said slide, a second slide, a counter-weight movably andadjustably secured on said second slide and adjusting means for movingthe two slides together, said adjusting device comprising ascrew-threaded spindle, said counter-weight being engaged thereby, saidspindle being hollow and provided with an internal screw thread ofopposite hand in which engages a screw threaded bolt mounted on a strapwhich is connected with the slide on. which the plate of the cuttershaft support is mounted.

3. A cigarette rod cutting device for cigarette machines including acutter shaft, a rotary cutter mounted on said shaft, planetary gearingfor driving the cutter shaft and a support for the cutter shaft, saidplanetary gearing comprising a friction wheel mounted on the cuttershaft, a conical friction disc disposed coaXially of the cutter shaftsupport and contacted by said friction wheel, said conical friction discbeing longitudinally movable and means for driving said friction disc.

43A cigarette rod cutting device for cigarette machines including acutter shaft, a rotary cutter mounted on said shaft, a rotary supportfor said cutter mounted on a bushing on a rotary spindle, a conicalfriction disc mounted directly on said spindle, said bushing beingprovided with ball bearing support on said spindle, and gearing meansfor rotat ing said spindle and bushing, said means including an uprightshaft having a bevel pinion adapted to mesh with two facing bevelpinions one of which is'secured directly to said spindle while the otheris connected to said bushing.

5. A cigarette rod cutting device for cigarette machines comprising arotatable'support, means to drive said support, a rotatable support andmeans for rotating said cutter cutter mounted on said support, means forsupport and said driver irrespective of the adjusting the position ofsaid cutter on said position of said bearings.

In testimony whereof I aflix m si ature.

support, adjustable means for continuously driving said cutter whilesaid first named means is actuated and means for driving said adjustablemeans.

6. A cigarette rod cutting device for cigarette machines comprising arotatable vibrating support, means to drive said support, a rotatablecutter mounted on said support, means for adjusting the radial positionof said cutter on said support, adjustable means for continuouslydriving said cutter while said first named means is actuated and meansfor driving said adjustable means.

7. A cigarette rod cutting machine as per claim 5, in which saidadjustable means for continuously driving said cutter comprises adisplaceably mounted friction disc mounted on a rotatable shaft and acooperating friction wheel connected to said cutter.

8. A cigarette rod cutting device for cigarette machines including acutter shaft, a rotary cutter mounted on said shaft, a supporting discfor said cutter shaft, a rotatable shaft to which said disc is mounted,a second rotatable shaft concentric with said first rotatable shaft androtatable independently of the latter, a conical friction disc mounteddirectly on said second named rotatable shaft and adapted to be movablelongitudinally thereof, means for setting said friction disc atdifferent points along said second rotatable shaft, a friction wheel onsaid cutter shaft adapted to engage said friction disc and means forrotating said two rotatable shafts in opposite direction from a commonsource.

9. A cigarette rod cutting machine as per claim 4, in which said uprightshaft is mounted in a housing said housing being rotatable, and in whichsaid spindle and bushing are mounted in a hearing which latter ismounted in turntable fashion to said housing whereby said spindle andbushing are rotatable in a plane at right angles to said upright shaftand driving means for rotating said upright shaft irrespective of thepositions of said housing and bearing.

10. In a cigarette rod cutting machine having a rotatable cutter mountedon a rotatable support and a rotatable driver for rotating said cutter,said driver being mounted on a spindle and said support being mounted ona bushing concentric with said spindle, a bearing for supporting saidbushing and spindle, an upright shaft having a pinion adapted to drivesaid bushing and spindle by meshing with two facing bevel pinionsmounted respectively to said spindle and bushing, a bear ing forsupporting said upright shaft, said first named bearing being rotatablerelative to said second named bearing and said second named bearingbeing rotatable relative to its MAX PAUL ERNS H HN.

